Valve.



W. S. FAIRHURST. VALVE. APPLICATION FILED 15017.26, 1912.

1,073,338, Patented Sept. 16, 1913. *wir gmffgj. I 32 7922 3;

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f/ f-/y/ AurrEn srA'rEs PATENT oEEc WILLIAM S. FAIRHURST, 0F NEW YORK,N. Y.

' VALVE;

i masse.

To nl? lello/m, z't may Concern.'

Be it known that I, WILLIAM S. FAIR- iiuns'r, a citizen of the United'States, 'and resident of the borough of Brooklyn, in the city and Stateof New York, have invented a new and useful Improvement in Valves, otwhich the following is a specification.

The object of this invention is to provide certain improvements in theconstruction, form and arrangement of the several parts of a valvewhereby its operation is facilitated and its structure simplied and itis capable of use either as a suction valve or as a discharge valve.

practical embodiment of my invention is represented in the accompanyingdraw,- ings` in which- Figure 1 represents in section a portion ot' afluid compressor with the valve applied thereto as a lsuction valve,Fig. 2 isa similar view with the valve applied as a; discharge valve,Fig. 3 is an inner end View with the parts in the position shown inFig. 1. Fig. 4 is a section. taken in the plane of the line A--A of Fig.1, Fig. 5 is a section taken in the plane of the line B-B of Fig. 1,Fig. 6 is a plan view of the valve proper, and Fig. 7 is a side view ofthe same. Y

ln Fig'. 1 the inner wall 1 of the cylinder is shown as provided withthe usual outlet port 2 and the outer wall 3 as being provided with theusual hole 4 through which the valve may be inserted and removed. A.removable cap covers the hole 4 and is removably secured to the outerwall 3, as, for' instance, by nuts and bolts 6 and 7.

In Fig. 2 the inner wall 1 of the cylinder is provided with a dischargeport 8 and the outer wall 3 is provided with a hole 9. for permittingthe insertion and removal of the valve. A removable cap 10 covers thehole 9 and is secured to the outer wall 3 by suitable means, such, forinstance, as nuts and bolts 11 and 12.

The valve seat 13 has a fluid passage 14 therethrough, the inner andouter portions of the said valve seat being connected by one or moreribs 15. This valve seatis provided with a peripheral flange 16 whichrests in an annular recess 17 surrounding the outlet port 2 when thevalve is used as a suction valve and in an annular recess 18 surroundingthe discharge port 8 when the valve is used as a discharge valve.

The valve is formed of spring sheet metal, such as sheet steel, andcomprises an an- Specification of Letters Patent. Patent edSept..16,1913,

Application filed November 26, 1912'.

Serial No. 733,603.

nula-r portion 19 and one or more inwardly projecting spring arms 20. 1nthe present instance I have shown two of these inwardly v projectingarms 20, each provided with a head 21 having ahole 22 therethrough fortheA reception ot1r the enlarged portion 23 of a guide pin 24,projecting from one face of the valve seat 13. These guide pins 24 areherein shown as bolts screwed into the valve seat and having screwthreaded ends projecting through a guide plate 25. The guide plate 25 isprovided on its face adjacent to the faceot the valve seat with lugs 26surrounding the bolts 24. Nuts 27 engaging the bolts 24 serve to holdthe guideV plate 25 with its lugs 26 rigidly againstthe enlargements 23on the bolts 24, on which enlargements the valve proper has a limitedbodily movement toward and awa)7 from its seat.

A coil spring 28 is interposed betweenlheannular portion 19 oi" thevalve proper and a peripheral flange 29 on the guide plate 25, whichspring serves to hold the valve normally closed. The spring-arms 2() ofthe valve proper permit the valve to be self-yielding after the valvehas reached the limit of its bodily movement away from the valve seat. Acommon lock washer 30 may be interposed between the nuts 27 and theadjacent face of the guide plate 25.

ll'hen the valve is used as a suction valve, a valve cage 3], such asthat shown in Fig. 1, is provided, which valve cage engages the flange16 of the valve seat. A bolt 32 eX tends through the cap 5 intoengagement with the cage 31 and serves to hold the valve seat rigidly inposition.

When the valve is reversed for use as a discharge valve, as shown inFig. 2, a slightly modified form of valve cage 33 is interposed betweenthe flange 1G of the valve seat and the bolt 32 which extends throughthe cover 10.

lt is intended to make the valve proper of spring sheet steel, thusinsuring a long life therefor.

lt will be seen that the valve proper has a ing of the valve with arelatively short movement of the valve on its guide. lt will also beseen that a valve constructed substantially in accordance with thedisclosure herein, will be suitable tor use either as a suction valve ora discharge valve by a mere reversal of the same.

While I have shown this valve inconnection with the cylinder of a fluidcompressor, itis to be understood that the valve may be used whereverapplicable.

What I claim is j l. A sheet metal valve comprising an annular Aportionprovided with two inwardly and oppositely projecting arms each leadingfrom one side of the annular portion to a point adjacent to the otherside thereof, the heads of said arms having holes' for the reception ofguide pins.

2. Avalve comprising avalve seat-,avalve guide plate, pins connectingthe plate with the seat, and a valve proper comprising an annularportion provided with two inwardly and oppositely projecting arms, eachleading from one side of the annular portion to a point adjacent to theother side thereof, said arms having holes in their free ends engagingsaid pins.

3. A valve comprising a valve seat, a valve guide plate, pins connectingthe plate with thc seat and a valve proper comprising an annular portionprovided with two inwardly and oppositely projecting arms, each leadingfrom one side of the annular portion to a point adjacent to the otherside thereof, said arms having holes in their free ends engaging saidpins, said valve proper having a limited bodily movement onsaid pins anda self-yielding movement.

4. A valve comprising a reversible valve seat provided with a peripheralflange intermediate its top and bottom faces, a valve guide plate, pinsconnecting the plate with the. seat and a valve proper having a limitedbodily movement and a selfLyielding movement between the valve seat andvalve guide plate, said valve proper comprising an annular portionprovided vwith, two inwardly and oppositely projecting arms, each armleading from one side of the annular portion to a point adjacent to theother side thereof, said arms having holes in their free ends engagingsaid pins.

In testimony, that I claim the foregoing as my invention, I have signedmy name inprescnce of two witnesses, this twentyfirst day of November1912.

WILLIAM S. FAIRI-IURST.

Witnesses:

F. GEORGE BARRY, C. S. SUNDGREN;

